Abstract

The giant magnetoimpedance of an glass-covered amorphous microwire was investigated in the frequency range of 10 MHz–3.5 GHz. It was found that when the exciting microwave current exceeds some threshold value, a periodic fine structure appears in the frequency dependence of the complex impedance. The appearance of this nonlinear phenomenon is interpreted to be a consequence of the parametric excitation of standing spin waves.

Received 08 December 2008Accepted 20 January 2009Published online 09 February 2009

Acknowledgments:

This work was done in the frame of common project AS CR–CSIC “Amorphous and nanocrystalline soft magnetic heterostructures and their applications” and was partly supported by the Grant Agency of the Czech Republic (Grant No. 102/08/0743) and Academy of Sciences of the Czech Republic (Grant No. AVOZ 10100520), as well as by the Project No. MAT2007-65420-C02-01 supported by the Spanish Ministry of Science and Innovation.